Tire Inspection - Repair - Replacement

Tread Wear Patterns and What They Mean

1. A smooth level line across the bead every 1-12" around the circumference of the tire indicates tires which are legally worn out.2. Tread worn more to the middle indicates tires which have been over-inflated. Always use a pressure gauge when inflating.3. Tread worn on both edges of the tire indicates tires which have been under-inflated. Check your tire pressure monthly.4. Tires worn more on one edge than another indicates an improper alignment and may also point to worn suspension components.5. Tread feathered across the width of the tire also indicates alignment problems and/or suspension component wear.6. Cupping or regularly-spaced depressions around the circumference of the tire, usually more pronounced on the edges, indicates tires which are out of balance and/or worn shocks and/or struts.7. A flat spot on one part of the tire indicates where a wheel locked during a skid. The will cause a vibration which can only be cured by replacing the tire.8. Feathering wear around the circumference of the tire can be best checked by touch rather than sight. Rub your hand around the tire in one direction and then the other. One will feel like you are sliding your hand down tiles steps; the other way will feel bumpy like you are rubbing up tiled steps. This also indicates an alignment issue and/or suspension component wear.